Effects of quenching temperature on microstructure and properties of 30CrNiMoV steel plate
The microstructure and mechanical properties of 30CrNiMoV steel plate were researched through the heat treatment processes of different quenching temperature in austenitizing and tempering temperature at 200 ℃.The results showed that the steel could maintain normal lathmartensite structure after quenching at 790-930 ℃ and tempering at 200 ℃,with the actual grain size 10 grade,good mechanical properties and cold forming performance,tensile strength not less than 1 650 MPa and elongation not less than 10 ％,which could bear 90° cold bending.When setting heating temperature in actual production,the different temperature fall ranges of the steel plate with different thicknesses after leaving heating furnace should be taken into consideration.Then the actual temperature of the steel plate should be controlled at not less than 790 ℃ in the beginning of water spray cooling,but the maximum heating temperature should not be higher than 930 ℃.
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维普
